—Tom often drives carelessly.—Tell him he ________ answer for it if he goes on behaving like that. 

Drunk driving is against the law now. It ______ be forbidden.

—Must we clean the classroom now?—No ,you _______.

 －Is Mr. Li in his office ?－No, he __________ in the office. He’s ill in hospital.

Facts prove that the world’s economic development is not a win-lose game but one in which all ______ be   winners.